CN202929905U - Epicycloid teaching appliance - Google Patents

Abstract

An epicycloid teaching appliance relates to a mathematical teaching appliance. The epicycloid teaching appliance can be used to make an epicycloid figure and simultaneously is also convenient for students to understand the forming process and principle of epicycloid. The epicycloid teaching appliance comprises a stationary ring (1) and a rolling ring (2). A ring groove (3) is processed on the outer ring surface of the stationary ring (1). The outer ring surface of the rolling ring (2) is placed inside the ring groove (3) of the stationary ring (1), and rolls along the ring groove (3) with no sliding. A fixing hole (4) used for fixing chalks is arranged along the axial direction of the rolling ring (2). The epicycloid teaching appliance provided by the utility model is used in university mathematics education and is convenient for students to conveniently understand the forming process and principle of epicycloid. By the adoption of the epicycloid teaching appliance, the quality of teaching is raised.

Description

The epicycloid teaching aid

Technical field

The utility model relates to a kind of teaching apparatus for mathematics.

Background technology

In College Mathematics Teaching, the teacher is when lecturing relevant epicycloidal shape and forming process to the student, owing to there is no relevant teaching aid, the teacher can only free-handly draw, not only graphing is nonstandard, wastes time and energy, simultaneously, when the teacher explains, the student also is difficult to understand, thus the quality of impact teaching.

The utility model content

The purpose of this utility model is to provide a kind of epicycloid teaching aid, and it not only can make the epicycloid figure, also is convenient to simultaneously the student and understands epicycloidal forming process and principle.

Realize above-mentioned purpose, the technical scheme that the utility model is taked is:

The epicycloid teaching aid, described epicycloid teaching aid comprises stationary ring and rotating ring, is processed with ring groove on the outer ring surface of stationary ring, and the outer ring surface of rotating ring is placed in the ring groove of stationary ring, and do nonslipping rolling along ring groove, be provided with vertically on rotating ring for the fixing fixed orifice of chalk.

Be fixed with three～four rubber cushions on the bottom surface of described stationary ring, described three～four rubber cushions are along the circumference uniform distribution setting of stationary ring.

Be provided with the cruciform handle in described stationary ring, described cruciform handle is fixedly connected with the inner ring surface of stationary ring.

The utility model with respect to the beneficial effect of prior art is:

One, utilize the utility model can make the figure of epicycloid (epitrochoid), particularly when the external diameter of the ring groove diameter of stationary ring and rotating ring was identical, the curve of drawing was cardiod.

Two, use epicycloid teaching aid of the present utility model also to be convenient to the student and understand epicycloidal forming process and principle, improved quality of instruction.

Description of drawings

Fig. 1 is epicycloid teaching aid vertical view of the present utility model;

Fig. 2 is the front view of Fig. 1.

Stationary ring 1, rotating ring 2, ring groove 3, fixed orifice 4, rubber cushion 5, cruciform handle 6.

Embodiment

As depicted in figs. 1 and 2, the epicycloid teaching aid, described epicycloid teaching aid comprises stationary ring 1 and rotating ring 2, be processed with ring groove 3 on the outer ring surface of stationary ring 1, the outer ring surface of rotating ring 2 is placed in the ring groove 3 of stationary ring 1, and do nonslipping rolling along ring groove 3, be provided with vertically on rotating ring 2 for the fixing fixed orifice 4 of chalk, chalk inserts interior convenient drawing of fixed orifice 4; The thickness of described rotating ring 2 is less than the thickness of stationary ring 1; Be fixed with three～four rubber cushions 5 on the bottom surface of described stationary ring 1, described three～four rubber cushions 5 can guarantee the stability of whole teaching aid along the circumference uniform distribution setting of stationary ring 1; Be provided with cruciform handle 6 in described stationary ring 1, convenient fixedly stationary ring 1, described cruciform handle 6 is fixedly connected with the inner ring surface of stationary ring 1, and the size of rotating ring 2 is set as required.

When drawing epicycloid, rotate rotating ring 2, rotating ring 2 is done nonslipping rolling in the ring groove 3 of stationary ring 1, utilizes the chalk that inserts in fixed orifice 4 to draw epicycloid on blackboard.

Claims (3)

1. epicycloid teaching aid, it is characterized in that: described epicycloid teaching aid comprises stationary ring (1) and rotating ring (2), be processed with ring groove (3) on the outer ring surface of stationary ring (1), the outer ring surface of rotating ring (2) is placed in the ring groove (3) of stationary ring (1), and do nonslipping rolling along ring groove (3), be provided with vertically on rotating ring (2) for the fixing fixed orifice of chalk (4).

2. epicycloid teaching aid as claimed in claim 1, it is characterized in that: be fixed with three～four rubber cushions (5) on the bottom surface of described stationary ring (1), described three～four rubber cushions (5) are along the circumference uniform distribution setting of stationary ring (1).

3. epicycloid teaching aid as claimed in claim 1 or 2, it is characterized in that: be provided with cruciform handle (6) in described stationary ring (1), described cruciform handle (6) is fixedly connected with the inner ring surface of stationary ring (1).

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